Construction set, preferably a toy set

ABSTRACT

A constructional toy set has building members and coupling members having dimensions which are equal to, multiples of, or specific fractions of a basic unit size, have a basic thickness or a multiple thereof, have through holes of basic hold diameter or multiples thereof with shapes symmetrical to either or both longitudinal and transversal axes thereof. End regions of the members may be semi-circular in form, and the through holes are positioned on the longitudinal axis or symmetrically to the sides thereof and at distances from themselves and the outermost points of the end region equal to set fractions of the basic size, equal to the basic size or to multiples thereof. The coupling members may be joined by threaded bolts and whose length is several times as long as the basic thickness. Nuts engage the bolts to lock the coupling members together. The configurations, dimensional proportions and relationships result in structural assemblies which are highly esthetically pleasing, with the figures simulating common animals, and which develops children&#39;s sense of space, form and harmony.

The invention relates to a construction set, preferably a toy set, whichcomprises building members and coupling members.

There are a large number of constructional toys known all over the worldwhich are popular and fashionable. These toys help developing children'smanipulating ability, provide free scope for imagination, therefore theyare toys of fancy, they develop children's creativity and inspire themto realize their ideas.

The constructional toys can be divided in two basic groups, i.e. planarand spatial toys. Planar toys comprise mainly planar elements, while theelements of spatial toys are bodies with three dimensions.

One of the most popular planar constructional toys is the so calledMarklin-toy, which has perforated metal lamina as building members,metal-screws as coupling members and auxiliary members [e.g. wheels]made also of metal. The members can be mounted by means of tools only[e.g. pliers, fork wrench, screw driver]. This toy is used mainly forassembling machines [e.g. cars, cranes, etc.]. Its main advantage liesin that it helps children learning the use of tools; its disadvantage ison the other hand that it might develop a technocrate attitude and doesnot increase children's aesthetical sense and artistic instinct.

A spatial building toy has been placed on the market with the trade-nameMatador. It has a set of members consisting of bodies of most commonbasic geometrical types made of wood [Such types are cubes, prisms,bricks and cylinders]. There are holes provided in the members and themembers are interconnected by means of wood pins. The mounting of themembers inevitably requires the use of various tools, first of all ahammer and pliers. This toy can be used also mainly for the assemblingof machines, vehicles [airplanes, cars, helicopter]. The drawback ofthis system lies in that it also helps developing a technocraticattitude.

There is a spatial building toy known designed for developing manualskill and sense of proportion of children in the age of 1-3 years, whichcomprises basic geometrical bodies as constructional members, mainlyrounded cylinder segments or rectangular prisms, and all of thesemembers comprise a central bore by means of which they can be assembledon a vertical rod. This toy is disadvantageous in the sense that it hasonly very limited variational possibilities.

The object of the invention is to provide a construction set which canbe used for assembling spatial bodies e.g. spatial toy figures in whichthe assembling operation does not require any tools what-so-ever, andwhich can develop children's manipulating ability, creativity, which canoffer free scope to fantasy and has a large variability and can developartistic instinct, too.

According to the present invention it has been discovered that theaforementioned drawbacks of conventional constructional toys can beeliminated or substantially reduced if the building and coupling membersare selected in such a way, that their forms and shapes reflect certaingeometrical proportions, by means of which the advantages of the planarand spatial toys will be combined.

According to the invention a construction set has been provided whichcan be used preferably as a toy set, which comprises building membersand coupling members in which according to the present invention thebuilding members comprise:

disc members with a diameter forming a basic size, the disc members havea common thickness which forms a basic thickness which is at least onesixth and at most one third of the basic size, the disc members haverespective central throughgoing holes with a common diameter which formsa basic hole diameter and it is at least one sixth and at most one thirdof the basic size;

elongated members with shapes symmetrical both to the longitudinal andtransversal axes thereof, the elongated members have a common widthwhich is substantially equal to the basic size, and they have a commonthickness substantially equal to the basic thickness, and the contourlines of the elongated elements in their end regions approach respectivesemi-circles whose diameter is substantially equal to the basic size,there are respective throughgoing holes in the end regions of theelongated members which have diameters substantially equal to the basicdiameter, the centre points of the holes lie in the longitudinal axes ata distance from the respective outermost points of the end regions andthis distance is substantially equal to the half of the basic size.

The coupling members comprise:

threaded bolts with an outer diameter loosely fitting the holes whichhave their diameter equal to the basic diameter, and the length of thesebolts is at least about three times as long as the basic thickness; and

nuts for engagement with the bolts, the outer diameter of the nuts issmaller than the basic size and greater than the half of the basic size,and the thickness of the nuts is at most as great as the basicthickness.

According to a preferred embodiment the contour line in the end regionsof the elongated members are formed by semi-circles.

According to a further embodiment the contour lines in the end regionsof the elongated members are formed by linear sections osculating thesemi-circles.

It is preferable if the nuts are circular and their width issubstantially equal to the basic thickness.

The size proportions are optimum if the basic diameter is substantiallyequal to the basic thickness and to the quarter of the basic size.

According to a preferable embodiment of the invention the elongatedmembers have lengths which are multiples of the basic size.

According to a further embodiment of the invention the building memberscomprise connecting members which have a width and height substantiallyequal to the basic size and the length thereof is at least equal to thebasic size, and the connecting members are symmetrical relative to atleast one symmetryc plane and comprise pairs of end planes normal to thesymmetryc plane and a planar face normal to the end planes, and aconnecting member each comprises at least two threaded bores withdiverging axes for receiving and engaging said bolts.

In a further preferable embodiment each of the connecting members areformed by a semi-cylinder with a diameter equal to the basic size and bya rectangular prism attached integrally to the semi-cylinder.

It is preferable for the assembling operations if the connecting membersdefine three threaded bores which have axes mutually normal to eachother and which intersect each other in the middle of the connectingmember.

For increasing the variability in a preferable embodiment the buildingmembers comprise additional elongated members which have a commonthickness which is substantially equal to the basic thickness, the shapeof the additional elongated members is similar to that of the elongatedmembers mentioned hereinabove but they have a common width which issubstantially twice as large as the basic size, and the additionalelongated members also have in their end regions respective throughgoingholes which are substantially as large as the holes of the normalelongated members and their centre points lie in the longitudinal axesof the members at a distance from the outermost points which issubstantially equal to the half of the basic size.

In a further embodiment the difference compared to this latterembodiment lies in, that the throughgoing holes are twice as far fromthe outermost points of the members, that is, their distance is equal tothe basic size.

According to a further embodiment of the invention the building memberscomprise additional disc members which have a diameter twice as large asthe basic size and they have central holes with diameters substantiallyas large as the basic diameter, and the thickness of these disc membersis substantially equal to the basic thickness.

The variability of the construction set will be increased if accordingto a further embodiment of the invention the building members comprisesemi-circular members with a diameter which is about twice as large asthe basic size and which has a thickness which is substantially equal tothe basic thickness, and each of the semi-circular members comprises atleast one bore with a diameter equal to the basic diameter.

According to a further embodiment of the invention the buildingelements, mainly the elongated members comprise further throughgoingholes with diameters substantially equal to the basic diameter and whichare at the central axis or symmetrically relative to the axis.

According to a further embodiment of the invention the coupling memberscomprise a cylinder with a diameter equal to the basic size or equal tothe double of the basic size, and this cylinder is at least as long asthe basic size and has a central bore with a size substantially as largeas the basic diameter. This bore can be a throughgoing bore or athreaded bore. This cylindrical member can be used as a distance keeper,as a coupling element or as a building element.

According to a further embodiment of the invention the basic sizereferred to hereinabove is at least 25 mm but it is most preferable ifthe basic size is about 50 mm.

When the construction set according to the invention is used it can beeasily understood, that the child will have much more combinational andvariational possibilities than with conventional sets and owing to thespatial size-selection, the appearance of the assembled constructionswill be more figurative and beyond a technocratic outlook. The artisticinstinct is also developed and figures can be constructed which imitateliving creatures like cats, dogs, etc.

The invention will not be described in connection with some preferableembodiments thereof, in which reference will be made to the accompanyingdrawings. In the drawings:

FIG. 1 shows a disc member;

FIGS. 2-7 show a set of elongated members;

FIG. 8 is a sectional view taken along lines A--A of FIG. 1;

FIG. 9 is a perspective view of a connecting member comprising asemi-cylinder and a rectangular prism;

FIG. 10 shows a coupling member made of a cylinder;

FIGS. 11 and 12 show additional building members made of half discs;

FIGS. 13 and 14 show two embodiments of further disc members;

FIGS. 15 and 16 show further elongated members with different holearrangement;

FIG. 17 shows a further disc member with a double diameter compared tothat shown in FIG. 1;

FIGS. 18-20 show additional elongated members having double sizecompared to those shown in FIGS. 2-4;

FIGS. 21-27 show various embodiments of threaded bores used as couplingmembers;

FIG. 28 shows a circular nut used for engagement with the threadedbolts;

FIG. 29 is a sectional view taken along lines B--B of FIG. 28;

FIG. 30 shows a distance keeping member;

FIG. 31 is a sectional view taken along line C--C of FIG. 30;

FIGS. 32-35 show a set of elongated members comprising different kindsof holes along their longitudinal axes;

FIG. 36 shows a further disc member;

FIGS. 37-40 show further embodiments of elongated members with doublesize; and

FIGS. 41-46 show various configurations which can be assembled by meansof the members shown in FIGS. 1-40.

Reference is made now to FIGS. 1 and 8 in which member 1 is shown whichhas a diameter a which forms a basic size or basic dimensional unitvalue for the construction set. The radius r of the disc is equal toa/2. A throughgoing central circular hole 8a is made in the disc 1 whichhas a diameter D and a thickness v. The diameter D forms a basicdiameter for the whole set and a thickness v forms a basic thickness. Itis preferable if the basic diameter D is equal or substantially equal tothe basic thickness v. It is also preferable if the thickness v is abouta quarter of the basic size a.

FIGS. 2-7 show elongated members 2-7 which have a width equal to thebasic size a. The thickness of the elongated members 2-7 is equal to thebasic thickness v. It is preferable if the length of the elongatedmembers 2-7 is a multiple of the basic size a, i.e. it can be expressedas n×a, in which n is an integer. The elongated members 2-7 are roundedat their end regions with respective semi-circles which have a diameterequal to the basic size a. It should be noted that the elongated membersare symmetrical to their longitudinal and to their transversal axes. Inthe embodiments shown in FIGS. 2-7 the elongated members have linearsides parallel to the longitudinal axis. It can be seen in the dashedline of FIG. 4 that the sides of the elongated member can be made ofappropriate arc sections. The end regions of the elongated members canbe formed by linear sections which extend tangentially to thesemi-circles. This embodiment is shown in FIG. 3 with the dashed lines.The elongated members have respective pairs of throughgoing holes 8a attheir end regions, and the distance between the outermost points of themembers and the central points O of the throughgoing holes 8a is equalto the half of the basic size a i.e. a/2. The diameter of thethroughgoing holes 8a is equal to the basic diameter D. For the sake ofsimplicity the geometrical relationships relating to the elongatedmembers are shown in FIG. 2 only. FIGS. 3-7 show the various possiblesizes of the elongated members.

FIG. 9 shows a connecting member 9 which can be used as an intermediatecoupling member between the individual elements in the set, and by meansof the application of the connecting member 9 the number ofconfigurations which can be made by the construction set can beincreased significantly. When the connecting member 9 is used, theassembled figures will have a different character of appearance. Theconnecting member 9 comprises a rectangular prism I and a half cylinderII which parts are united to form a single integrated body. It can beseen in FIG. 9 that the width and the height of the connecting member 9are both equal to the basic size a as well as its length which alsoconforms to this size. With these dimensions the connecting member 9fits harmonically in the other members of the set, shown in FIGS. 1-8.The connecting member 9 comprises three threaded, orthogonal holes 8b,which have mutually perpendicular axes which cross each other in thecentre of the connecting member 9. These axes can be considered as aspatial coordinate-system. The mouthes of the holes 8b lie in threedifferent surfaces of the connecting member 9. With the geometricalrelationships shown in FIG. 9 it can be seen that the distance betweenthe centre points O of the holes 8b and the nearest planar surface ofthe member is equal of the half of the basic size a. The threaded holes8b have a diameter d which conforms to the diameter of threaded boltsshown in FIGS. 21-27, whereby these bolts can be screwed in the holes8b.

FIG. 10 shows a cylinder 10 which can be used either as a couplingmember or as a distance keeper. The diameter of the cylinder 10 is equalto the basic size a and its length is also just as large. There isprovided a central bore or two central bores in the cylinder 10 whichcan be threaded bores 8b with a diameter d or throughgoing holes with adiameter D. When threaded bores are made in the cylinder 10, thethreaded bolts can be screwed therein.

FIGS. 11 and 12 show two semi-circular members 11 and 12 which have athickness equal to the basic thickness v. The diameter of thesemi-circular members 11 and 12 is twice as great as the basic size a,that is, their radius is just equal to the basic size. Near to a cornerof the member 11 there is provided a throughgoing hole 8a which has acentre point O which lies in both directions at a distance of a/4 fromthe corner point S. In the semi-circular member 12 shown in FIG. 12 thedifference lies in, that the centre point of the throughgoing hole lieson the symmetry-axis of the member and the distance between the centrepoint and the linear section of the member 12 is equal to a/2. Thediameter of these holes is equal to the basic diameter D.

FIGS. 13 and 14 show disc members 13 and 14 with a thickness equal tothe basic thickness. The diameter of the discs is twice as large as thebasic size a. The disc member 13 comprises four throughgoing holes 8awith a diameter D, one of them is arranged centrally while the remainingthree holes are arranged in the apex points of a regular triangle. Theradial distance between these apex points and the centre of the disc isequal to the half of the basic size a. The disc member 14 shown in FIG.14 comprises three throughgoing holes 8a arranged in the apex points ofa isosceles triangle show that two of these points are at a distance of3/4a from the centre point or axis O of the disc 14, while the distancebetween the remaining hole and the centre point is a/2. FIGS. 15 and 16show elongated members 15 and 16 which have a length of 3a and width 2a,and the radius of their end circles is equal to a. In the longitudinalaxis x of the member 15 there is provided a hole 8a with a centre lyingat a distance of a/2 from the end point of the member. In the elongatedmember 15 there are provided further two throughgoing holes of diameterD arranged symmetrically relative to the axis x at a distance of a/2.The longitudinal distance between these holes and the corresponding endpoint of the member 15 is also a/2. The elongated member 16 comprisesalso three throughgoing holes with a diameter D, two of them arearranged on the longitudinal axis x, symmetrically to the transversalaxis y, and the third hole is arranged on the axis y. The distancebetween the axis y and the first two holes is equal to the basic size a,while the distance between the axis x and the third hole is equal to3/4a. It can be observed that the three centre points of the holes inthe members 15 and 16 fall on the apex points of respective isoscelestriangles. The thickness of the members 15 and 16 is equal to the basicthickness v.

FIGS. 17-20 show further members 17-20 which can complement the membersshown in FIGS. 1-16 to make the construction set more versatile. Disc 17has a diameter twice the basic size a and this double size is equal tothe width of the elongated element 18-19 and 20. However, the length ofthe elongated elements remains an integer multiple of the basic size a.The disc 17 comprises a central hole of diameter D, and the diameter ofthe semi-circles at the end regions of members 18-20 is double the basicsize. The elongated members 18-20 comprise respective pairs ofthroughgoing holes arranged on their longitudinal axis x and the centralpoint of these holes are at a distance of a from the nearest end pointsof the member. It can be seen that for the elongated members 18-20 thepreviously described rules are valid according to which the distancebetween the end points and the centres of the throughgoing holes is halfthe width of the members. Of the members 18-20 the basic geometricalrelationships have been illustrated only in connection with member 18.The thickness of these members is equal to the basic thickness.

FIGS. 21-29 show the embodiment of the coupling members used in theconstruction set. There are threaded bolts 21-27 shown in FIGS. 21-27which have an outer diameter d and length 1₁ . . . 1_(n) which are aninteger multiple of the basic width d. The diameter d is selected sothat bolts should loosely fit the basic diameter D throughgoing holes8a. The length of the shortest threaded bolt 21 designated by 1₁ is fourtimes as long as the basic thickness v. FIGS. 28 and 29 show disc-shapednuts 28. The thickness of the nut 28 is equal to the basic thickness v,while the outer diameter E is smaller than the basic size a. In apreferable embodiment the basic size a can be 50 mm, the basic diameterD; 12 mm, the diameter of the threaded bolts d can be somewhat smallersuch as 12 mm, while the outer diameter of the nuts 28 can be about 30mm. The shortest should threaded bolts should 1₁ at least of 4v, becausethe bolts should be used for coupling at least two members with acombined width of 2v, and the respective width of the two nuts at thetwo ends of the coupling is 2v.

The threaded bolts shown in FIGS. 21-27 have a spindle-like form.Instead of this form bolts with heads e.g. of a size of the nuts can beused, and in that case it is sufficient if the minimum length of thebolts is equal to 3v.

FIGS. 30 and 31 show distance rings 29 made preferably of a resilientplastic material with a length substantially equal to the basicthickness v and an outer diameter F somewhat greater than the basicdiameter D. In an alternative embodiment instead of the rings shortthreaded cylinders can be used as distance keeping members.

FIGS. 32-35 show elongated members 40, 50, 60 and 70 which are similarto the members 4-7 shown in FIGS. 4-7, the only difference lies in that,in addition to the holes 8a at the two end regions, they are providedwith additional holes with diameters D, which additional holes arearranged on the longitudinal axis x of the members. The elongated member40, which has a length 4a and a width a, comprises a third hole in themiddle of its body i.e. where the transversal axis y crosses thelongitudinal axis. The distance between the medium hole and the twoholes at the end regions is designated by e in which a<e<2a. In FIGS.33-35 only the full length of the members and the geometrical sizesdefining the positions of the respective holes have been illustrated.The elongated member 50 with a length 5a also comprises three holes, twoat the end regions and one in the middle. The distance between themiddle hole and the other holes is equal to 2a. The elongated member 60shown in FIG. 34 comprises five holes arranged in such a way that thetwo outermost holes are in a distance of a/2 from the two end points ofthe member, the two next holes are arranged at a distance a innerrelative to the outermost holes, and the fifth hole in the middle is ata distance e from its neighbouring holes, in which 2a>e>a. The elongatedmember 70 shown in FIG. 35 comprises two pairs of holes, the inner pairof holes are arranged at a distance a from the outer pair. As it can beseen in the drawings the position of each hole is defined by theposition of its centre point O as illustrated in FIG. 32.

FIG. 36 shows a disc member 30 which is similar to the disc 1 shown inFIG. 1, the difference lies in that the disc member 30 has a diameter a'greater than the basic size a, but it is smaller than the double of thebasic size 2a, i.e. 2a>a'>a.

FIGS. 37-40 show elongated members 180, 190, 200, 210, respectivelywhich are similar to the members shown in FIGS. 18-20, and their widthis the double of the basic size a, their length is an integer multipleof the basic size. These elongated members also comprise respectiveholes at their end regions of a diameter equal to the basic diameter D.These holes have centre points falling on the longitudinal axis. Thedistance between the centre points of these holes and the nearest endpoints of the members is equal to the half of the basic distance a. Thethickness of these members is equal to the basic thickness v.

It should be noted, that the length of the elongated elements is notlimited to the numerical examples illustrated in the drawings and theelongated elements can be made as long as it is contempleted to besufficient for a given set.

FIGS. 41-46 show a number of exemplary toy constructions which can beassembled by using the members shown in FIGS. 1-40. FIG. 41 shows acrocodile-like model made of elongated members 2-5 and of couplingmembers. For the sake of simplicity the coupling members have not beendesignated by reference numbers. It can well be understood that byloosing the coupling members and by turning or rotating the elongatedmembers followed by the fastening of the coupling members theconfiguration of FIG. 41 can be converted into a pratically unlimitednumber of shapes, varying between a linear line section and awheel-like, completely bent form.

FIG. 42 shows a cat-figure which is sitting in the position shown infull lines, and if three of its component members are turned in theposition shown by the dash lines, the cat will be standing. In thisembodiment in addition to the coupling members the members 2, 3, 4; 11and 16 have been used to make the desired shape.

FIGS. 43-45 show a cow-figure in three different positions, whereby itwill be clear how many positions can be realized by the construction setaccording to the invention even within the same general configuration.The cow-figure has been made by the members 1, 2, 3, 5; 11, 15, 16, 17and 19 and by the appropriate number of coupling members.

FIG. 46 shows a dog-like body in which connecting members 13 have alsobeen used, and one of the connecting members 13 can be seen in thedrawing. In addition to the coupling members the members 1, 4, 6, 17have been used for this configuration and in addition to these elementsa member 20' has also been used which is similar to the elongated membershown in FIG. 20, but it has a length of 6a. The figure shown in FIG. 46can be considered by a child not only as a dog, but as a small couch ora box-like figure and it can also be considered as a bird shiluette. Thelarge number of possible explanations makes it clear that theconstruction set according to the invention offers a wide field for thephantasy of the child whereby his or her creational ability will bedeveloped.

The advantages offered by the present invention can be summarized asfollows:

The construction set combines the advantages of planar and spatialbuilding sets without their drawbacks. It motivates children forcreating always newer and newer forms, whereby their creativity isincreased develops childrens' aesthetical sense, and offers a wide scopefor the improvement of their fantasies. Although reliable joints aremade by threaded bolts and nuts made preferably of wood, the automaticdevelopment of childrens' manipulating and assembling ability is assuredby the present invention. Even with a comparatively few number ofbuilding members the construction set according to the present inventionoffers a wide scope for combinational possibilities, since a largenumber of models such as machines including cranes, cars, helicopters,airplanes as well as several kinds of animal models such as cows,horses, dogs, snakes, etc. can be assembled there width. The elements ofthe set are easy to manufacture and the set itself can be packed andcirculated in appropriate compact units.

The invention can not be limited to the preferable embodiments explainedand illustrated hereinabove and it can be modified and changed withoutdeparting from the essence and spirit thereof. It should be emphasizedthat wood is considered to be the most appropriate material for thevarious elements of the construction set, however, the application ofother materials such as appropriate plastic materials can also beuseful.

I claim:
 1. A toy construction set, comprising building members andcoupling members, said building members comprising:disc members of adiameter forming a basic size a, said disc members having a common basicthickness v being at least one sixth and at most one third of said basicsize a, said disc members including respective central throughgoingholes of a common basic diameter D being at least one sixth and at mostone third of said basic size a; elongated members with shapessymmetrical both to the longitudinal and transversal axes thereof, saidelongated members having a common width substantially equal to saidbasic size a and a common thickness substantially equal to said basicthickness a, and having respective end regions with contour linesapproaching semi-circles with diameters substantially equal to saidbasic size a, said elongated members having in said end regionsrespective throughgoing holes with diameters substantially equal to saidbasic diameter D, said holes have their center points lying on saidlongitudinal axis at a distance from the respective outermost points ofsaid regions which is substantially equal to the half of said basic sizea; said coupling members comprising: threaded bolts with an outerdiameter d loosely fitting in said holes with said basic diameter D,said bolts having lengths at least about three times as long as saidbasic thickness v; and nuts for engagement with said bolts, said nutsbeing outer size smaller than said basic size a and being larger thanhalf said basic size a, said nuts being of thicknesses at most equal tosaid basic thickness a; said building members further comprisingconnecting members having a width and height substantially equal to saidbasic size a, and a length at least equal to said basic size a, saidconnecting members being symmetrical relative to at least one symmetryplane and comprising pairs of end planes normal to said symmetry planeand a planar face normal to said end planes, and said connecting memberseach comprising at least two threaded bores with diverging axes forreceiving and engaging said bolts; said connecting members being formedby a semi-cylinder with a diameter equal to said basic size a and by arectangular prism attached integrally to said semi-cylinder; saidconnecting members having three said threaded bores whose axes aremutually normal to each other and intersect each other in the middle ofsaid connecting member; said building members further comprisingadditional elongated members having a common thickness substantiallyequal to said basic thickness v, said additional elongated membershaving shapes similar to that of said elongated members but having acommon width substantially twice said basic size a, said additionalelongated members having in their end regions respective throughgoingholes being substantially as large as said throughgoing holes of saiddisc members and having center points lying on the longitudinal axes ofsaid members at a distance from the outermost points of said regionswhich is substantially equal to the half of said basic size a; saidbuilding members further comprising additional disc members havingdiameters twice as large as said basic size a and central holes withdiameters substantially as large as said basic diameter D, saidadditional disc members having a thickness substantially equal to saidbasic thickness v; said building members further comprisingsemi-circular members with a diameter about twice said basic size a andwith a thickness being substantially equal to said basic thickness v,each of said semi-circular members having at least one hole therewithinof a diameter equal to said basic diameter D; said building membersfurther comprising further elongated members having a common thicknesssubstantially equal to said basic thickness v, said further elongatedmembers having shapes similar to that of said elongated members buthaving a common width being substantially twice of said basic size a,said further elongated members having in their end regions respectivethroughgoing holes with diameters substantially equal to said basicdiameter D, said holes having their center points on the longitudinalaxes of said members at a distance from the outermost points of saidregion which is substantially equal to said basic size a; and said basicsize a being at least 25 mm.
 2. The construction set as claimed in claim1, wherein said contour lines in the end regions of said elongatedmembers are formed by said semi-circles.
 3. The construction set asclaimed in claim 1, wherein said contour lines in the end regions ofsaid elongated members being formed by linear sections osculating saidsemi-circles.
 4. The construction set as claimed in claim 1, whereinsaid nuts are circular and have a width substantially equal to saidbasic thickness a.
 5. The construction set as claimed in claim 1,wherein said basic diameter D is substantially equal to said basicthickness v and is substantially equal to the quarter of said basic sizea.
 6. The construction set as claimed in claim 1, wherein said elongatedmembers have lengths which are multiples of said basic size a.
 7. Theconstruction set as claimed in claim 1, wherein said building membershave further throughgoing holes with diameters substantially equal tosaid basic diameter D and arranged symmetrically relative to said axis.8. The construction set as claimed in claim 1, where said couplingmembers comprise a cylinder with a diameter equal to said basic size a,said cylinder being at least as long as said basic size and having acentral bore of a size substantially as large as said basic diameter D.